Phylum porifera explanation?
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1. poriferians are called pore bearing organisms.
2. they are assymetrcal animals .
3. they have special type of water canal sytem and it will help in defence mechanisms , excretion exchanging of gases .
4. in these type of organisms water enter into the ostia pore and comes out of the body through osculum pore . they have spongycooel cavity and it lined by special type of cells called Collar cells .
5. they are called hermaphrodite organisms .
exampes are sycon euspongilla etc ..... I hope it will help u
1. poriferians are called pore bearing organisms.
2. they are assymetrcal animals .
3. they have special type of water canal sytem and it will help in defence mechanisms , excretion exchanging of gases .
4. in these type of organisms water enter into the ostia pore and comes out of the body through osculum pore . they have spongycooel cavity and it lined by special type of cells called Collar cells .
5. they are called hermaphrodite organisms .
exampes are sycon euspongilla etc ..... I hope it will help u
Answered by
3
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Well, the term Porifera is actually the scientific name given to the group of organisms known commonly as sponges.
But, unlike SpongeBob, living sponges are neither square in shape nor in interest - they are actually a really important and diverse phylum within the animal kingdom.
⭐️ The approximately 5,000 living sponge species are classified in the phylum Porifera, which is composed of three distinct groups.
They are as follows :
✨ Hexactinellida.
✨ Demospongia.
✨ Calcarea.
⭐️⭐️ Phylum Porifera has the following salient features : ⭐️⭐️
❤️ All the sponges are Aquatic, Sedentary, Asymmetrical or Radially, First multicellular organisms and have cellular grade of organization.
❤️ They are diploblastic. Ectoderm is formed by pinacocyte and endoderm is formed by choanocyte. Both layers are called pinacoderm and choandoderm.
❤️ The body is perforated by numerous minute pores called Ostia.
❤️ The Ostia open into a large cavity called spongocoel.
❤️ The spongocoel opens to the outside by a large opening called osculum.
❤️ The sponges possess an endoskeleton in the form of calcareous spicules.
❤️ Excretion and respiration occur by diffusion.
❤️ They have greater power of regeneration.
❤️ Reproduction takes place by asexual or sexual methods.
❤️ Development is indirect or direct. The common larval are parenchymula, amphiblastula, etc.
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